Dendrite lithium pụtara na mgbe ọnụọgụ lithium agbakwunyere na graphite karịrị nnabata ya, ion lithium ngafe ga-ejikọta ya na electrons na-abịa site na electrode na-adịghị mma wee malite itinye ego n’elu electrode na-adịghị mma. Na usoro nke fanye batrị, a voltaji si n’èzí ụwa na esịtidem lithium ion anode ihe pụta n’ime electrolyte ọkara, electrolyte nke lithium ion nakwa n’okpuru ọnọdụ nke voltaji dị iche n’etiti ụwa n’èzí na carbon oyi akwa ịkwaga. , n’ihi na graphite bụ a layered ọwa, lithium lithium ga-abanye na ọwa na carbon na-emepụta carbon ogige, LiCx (x = 1 ~ 6) graphite interlaminar ogige kpụrụ. Enwere ike igosipụta mmeghachi omume electrochemical na anode nke batrị lithium dị ka ndị a:

N’ime usoro a, ị nwere otu paramita, foto ahụ, ma ọ bụrụ na ị gbakwunye ha abụọ ọnụ foto a, ị ga-enweta lithium dendrite. Enwere echiche ebe a nke onye ọ bụla maara, ogige interlaminar graphite. Ogige interlamellar graphite (GICs maka mkpụmkpụ) bụ ogige kristal nke a na-etinye ndị na-abụghị carbonaceous reactants n’ụdị graphite site n’ụzọ anụ ahụ ma ọ bụ kemịkalụ iji jikọta ya na ụgbọ elu netwọkụ hexagonal nke carbon ka ọ na-ejigide usoro lamellar graphite.

atụmatụ:

A na-echekwa lithium Dendrite n’ozuzu na ọnọdụ kọntaktị nke diaphragm na ogwe adịghị mma. Ụmụ akwụkwọ nwere ahụmahụ n’ịkwasa batrị kwesịrị ịhụ oyi akwa isi awọ na diaphragm. Ee, nke ahụ bụ lithium. Dendrite lithium bụ lithium metal kpụrụ mgbe lithium ion natara eletrọn. Igwe lithium agaghịzi emepụta lithium ion iji sonye na chaja na mmeghachi omume nke batrị, na-ebute mbelata ikike batrị. Dendrite lithium na-eto site na elu nke electrode na-adịghị mma n’ebe diaphragm nọ. Ọ bụrụ na a na-edobe ọla lithium n’ihu, ọ ga-emecha kpọpuo diaphragm wee mee ka batrị dị mkpụmkpụ, na-ebute nsogbu nchekwa batrị.

Ihe Na-emetụta Ya:

Isi ihe na-emetụta nguzobe nke dendrite lithium bụ ihe siri ike nke elu anode, gradient nke lithium ion na njupụta dị ugbu a, wdg. Tụkwasị na nke ahụ, ihe nkiri SEI, ụdị electrolyte, nchịkọta solute na ebe dị irè n’etiti ihe dị mma. na electrodes na-adịghị mma niile nwere mmetụta ụfọdụ na nhazi nke lithium dendrite.

1. Ngwongwo elu na-adịghị mma

Ihe na-adịghị mma nke elu electrode na-adịghị mma na-emetụta nhazi nke lithium dendrite, na ihe dị n’elu dị elu, otú ahụ ka ọ na-enye aka ịmepụta lithium dendrite. Nhazi nke lithium dendrite gụnyere isi ihe anọ, gụnyere electrochemistry, crystology, thermodynamics and kinetics, nke a kọwara n’ụzọ zuru ezu n’ime akụkọ David R. Ely.

2. Gradient na nkesa nke ion ion lithium

Mgbe ịgbanahụ ihe dị mma, ion lithium na-agafe na electrolyte na akpụkpọ ahụ iji nweta electrons na electrode ọjọọ. N’oge usoro ịchaji, ntinye nke ion lithium na electrode dị mma na-eji nwayọọ nwayọọ na-abawanye, ebe ntinye nke ion lithium na electrode ọjọọ na-ebelata n’ihi nnabata nke electrons na-aga n’ihu. N’ime ngwọta dilute nwere njupụta dị ugbu a, ntinye ion na-aghọ efu. Ihe nlereanya nke Chazalviel na Chazalviel guzobere na-egosi na mgbe a na-ebelata mkpokọta ion ka ọ bụrụ 0, electrode na-adịghị mma ga-eme ka ụgwọ oghere dị na mpaghara wee mepụta usoro dendrite. Ọnụ ọgụgụ na-eto eto nke usoro dendrite bụ otu ihe ahụ nke ion migration rate na electrolyte.

3. Njupụta ugbu a

N’ime edemede Dendrite Growth na Lithium/Polymer Systems, onye edemede ahụ kwenyere na ọnụ ọgụgụ Uto nke n’ọnụ nke Dendrite Lithium nwere njikọ chiri anya na njupụta dị ugbu a, dị ka egosiri na nhata ndị a:

Foto ahụ

Ọ bụrụ na njupụta dị ugbu a na-ebelata, uto nke lithium dendrite nwere ike igbu oge ruo n’ókè ụfọdụ, dị ka egosiri na foto dị n’okpuru:

Foto ahụ

Olee otú iji zere:

Usoro nhazi nke lithium dendrite ka doro anya, mana enwere ụdị uto dị iche iche nke metal lithium. Dị ka nhazi na mmetụta na-emetụta dendrite lithium, e nwere ike izere nhazi nke lithium dendrite site na akụkụ ndị a:

1. Na-achịkwa elu elu nke ihe anode.

2. Nha nke ihe na-adịghị mma kwesịrị ịdị ntakịrị karịa radius thermodynamic dị egwu.

3. Jikwaa wettability nke electrodeposition.

4. Na-amachi ikike nke electroplating n’okpuru uru dị oke egwu. Tụkwasị na nke a, enwere ike imeziwanye usoro nchaji na ịgbasa usoro ọdịnala, dịka ọmụmaatụ, enwere ike ịtụle ọnọdụ pulse.

5. Tinye ihe mgbakwunye electrolyte nke na-eme ka ihe na-adịghị mma-electrolyte interface guzosie ike

6. Dochie mmiri mmiri electrolyte na ike dị elu gel / siri ike electrolyte

7. Mepụta oyi akwa mkpuchi elu nke ike lithium anode dị elu

N’ikpeazụ, a hapụrụ ajụjụ abụọ maka mkparịta ụka na njedebe nke akụkọ a:

1. Ebee ka mmeghachi omume electrochemical nke ion lithium dị? Otu bụ na lithium ion n’elu graphite electrochemical mmeghachi omume mgbe siri ike uka nyefe, iru saturation ala. Nke abụọ, lithium ion na-akwaga n’ime ọkwa graphite site na oke ọka graphite microcrystals wee meghachi omume na graphite.

2. ion lithium ọ na-emeghachi omume na graphite ka ọ mepụta lithium carbon compound na dendrite lithium synchronously ma ọ bụ n’usoro?

Nabata ka anyị kparịta ụka, hapụ ozi ~